Exercise platform



FIG. 1 is a perspective view of an exercise platform showing my new design;

FIG. 2 is a side view, all other side views being a mirror image thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof; and,

FIG. 5 is an exploded perspective view thereof. 

The ornamental design for an exercise platform, as shown and described. 